| (19) |
 |
|
(11) |
EP 0 126 528 A3 |
| (12) |
EUROPEAN PATENT APPLICATION |
| (88) |
Date of publication A3: |
|
02.05.1985 Bulletin 1985/18 |
| (43) |
Date of publication A2: |
|
28.11.1984 Bulletin 1984/48 |
| (22) |
Date of filing: 27.03.1984 |
|
|
| (84) |
Designated Contracting States: |
|
DE FR GB IT NL SE |
| (30) |
Priority: |
06.04.1983 GB 8309275
|
| (71) |
Applicant: ALLIED COLLOIDS LIMITED |
|
() |
|
| (72) |
Inventors: |
|
- Allen, Adrian S.
()
- Flesher, Peter
()
|
|
| |
|
| (54) |
Polymer dispersions and their preparation |
(57) A dispersion of water soluble or water swellable polymer in water immiscible liquid
is made by reverse phase polymerisation utilising a dispersing system comprising a
polymerisation stabiliser and the resulting dispersion, optionally after dehydration,
may be distributed into water utilising a distributing system. The dispersing system
or the distributing system, or both, includes at least one non-ionic compound selected
from C
6-
12 alkanols, C
4-12 alkylene glycol monoethers and their C
1-4 alkanoates, C
6-
12 polyalkylene glycol monoethers and their C
1-4 alkanoates and benzyl alcohol. Novel dispersions are made by reverse phase polymerisation
and, in particular, include a non-ionic compound selected from C
4-12 alkylene glycol monoethers, their C
1-4 alkanoates and C
6-12 polyalkylene glycol monoethers and their C
1-4 alkanoates. When the polymer is water soluble a solution of it in water can be made
by distributing the dispersion into water.